Change PbPb year comment to Run2 to avoid confusion since setting is common for 2015 and 2018
Change PbPb year comment to Run2 to avoid confusion since setting is common for 2015 and 2018

rbailhac/AliPhysics,alisw/AliPhysics,rbailhac/AliPhysics,alisw/AliPhysics,alisw/AliPhysics,rbailhac/AliPhysics,alisw/AliPhysics,alisw/AliPhysics,alisw/AliPhysics,rbailhac/AliPhysics,rbailhac/AliPhysics,rbailhac/AliPhysics,alisw/AliPhysics,rbailhac/AliPhysics